SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS (Details) - Allowance for estimated losses on mortgage loans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation allowances and qualifying accounts
Balance as of beginning of period	$ 8	$ 21	$ 42
Additions charged to costs and expenses	(4)	(5)	(11)
Deductions	1	8	10
Balance as of end of period	$ 3	$ 8	$ 21